Another job well done! I like how you explain every step.

Thank you for doing these videos. I am a single 54 year old women who is on a fixed income. Because I raised 3 kids by myself I've had to learn to do most everything in my house, welding, plumbing, carpentry etc and thanks to YT and people like you who post how tos I can do it safely. My 40 year old furnace finally gave up so here I am!

40 years of DIY, and the random amount of useful stuff you just spit out actually taught me quite a few new tricks. Kudos man, you know what you're doing.

I installed a Goodman 5 ton split system 18 years ago and its still working great. I ran the line set, built the plenum... installed all new duct work. The only thing I did not do was braze the line set and charge they system. *** NOTE *** It took several phone calls before some one would come and braze line and charge system because I installed the system myself. The business that did come out made it clear that if the system did not work it would be time and materials to fix. The service guy charged the system, looked around, asked a few questions and said I did a very good job and that he would hire me if I was looking for work.

No dip switches nothing? No discussion on deration and gas pressures?

Great video! Completed our DIY furnace replacement last night. This video gave me the confidence to tackle the job. 25 year old Carrier to new Goodman. I had replaced lots of components over the years on the Carrier. Thanks for sharing valuable content.

Thank you for taking the time to make this video. People like you spreading your knowledge is what makes this world a better place!

Thanks now have the confidence to take this on. Just did a water heater for first time. Only difference is a bit of wiring.

Very clean install. Wiring management and sealing and double checking everything A+

Where I live, there is a local company that will let you order equipment online and pickup locally. I do have the EPA certification to buy and handle refrigerant. I saved about $4500 installing my own furnace, coil, plenum, and condenser.

Man, you’re making me think I can actually do it. Looks so easy!! I’m a DIYer but thought furnace was one too far. At the same time, I’m so fed up with these repair guys I won’t even let them come to the house. Had an A/C issue with one and they ended up by two new ones after they “Looked at em”. I’ve heard nothing but good with the Goodman brand. Truly appreciate these videos!!!

Thank you for a good video. I would like to know about the initial set up of fan speed , temperature rise and external static pressure.

Thank you so much for what you do. Just got quoted $11,000 to install a new 58,000 BTUs furnace. I'm absolutely not paying that. And thanks to your video I don't have to. You have no idea how much you help people.

You can totally install yourself. But I advise people to really make sure that they know what they're doing before they start it. I am just learning this under a plumbing, Heat, AC, gas, company rightnow. I was working with a gas fitter today. I installed a Carrier furnace. He had me doing the gas connections fittings and he would check on me. And I was extremely nervous. I was double checking and triple checking my connections. Testing for leaks. But I guess he said I did a really good job, because all of the gas lines were run perfectly he said. The job entailed that I had to remove the hot water tank in order to even get the furnace out because space was so tight.But I did a lot of it by myself for the first time. He was obviously monitoring, as it's the law in Canada, and I can't be working on gas lines without a red seal gas fitter with me, But I pretty much did it on my own and that was the goal today. I feel good. He was mostly doing the cutting of the sheet metal for the vents, and electrical today and not me, because he said that part had to be perfect. I'm learning a lot. And it feels good.

Doing that right now. You saved me a lot of time with your practicallity! Thank you!

In Georgia we’re not allowed to directly connect the flex gas line inside the unit other than that everything else was fine to me👍.

Dave - just wanted to sincerely thank you for putting out this content. Amazing information, and much needed!! Great work and tips.

I did a Goodman 100 Mbuh, two stage, 80% for $2050.- That includes the $100.- 24 ga riser and a 36” break; sheet metal, black pipe and valve. I am going to do another at my daughter’s. I reused the thermostat. I am really happy with HVAC Direct.

I didn’t know that about Goodman that is good to know. I replaced my system this summer, I used Frigidaire equipment that I had to purchase through a friend who is a licensed hvac contractor. My home didn’t have any ductwork so I had to install all of my supply duct through my attic and make a return. All in all it took me about 80 hours.

Thank you. I am not a tech. But your video helped me to save $1500 cost of installation.

Thank you, your videos helped me a lot. I put in a new Goodman furnace this year before the cold hit. On another topic: REPAIRS::I did find out that should there be a problem where I need to call a technician, it costs $145 for them to just show up which could rack ups hefty bill. And some people can’t afford the repair side either. I think it would be wise to design a system where you have 2 identical furnaces hooked up and ready to go in case #1 furnace has issues, you could turn off power to #1 and turn power on to #2,, then go back to bed, knowing your family is safe and warm. You can then fix #1 later and not have to pay ridiculous $145 labor rates.

I'm thinking of getting into HVAC school. I also have a Friedrich furnace from the 80s lol. It STILL WORKS!

I am Removing my furnace today thanks so much for all Of your tips!!!

I didn't even know you could tip someone on youtube before because you're the first person I ever wanted to, lol.

Great video. Detailed content👍🏾

Question. What to do if the replacement furnace dimensions are not quite the same. For example, replacing a type C 21 inch wide furnace with another type C that is shorter by about 7 inches. Is it OK to put blocks underneath the furnace to increase the height?

Thank you THANK YOU ! Your videos are great & easy to understand! I'm definitely gonna tackle my own project in updating my furnace ( I was told by professional Hvac services) supposedly it's over sized in my home & my home ( 1950's ) still have the under sized air ducts & a system that's to large .. which case in ohio my home was definitely freezing ( quick heat up by furnace & then a lengthy cool down ) definitely a large number of electric heaters plugged in to survive 12 degree weather ( trying to be proactive before winter ) I have a toddler In the home ( 😅 first winter in my home )

thank you I am in the process of a furnace replacement myself I allready replaced the rented water heater for a used one I bought ( works perfect ) now Im looking at the 50 yr old furnace to replace just not sure what size as theres no labels or any info anywhere on the unit I think it must have come out of the ark, but I have pretty good problem saving skills and engineering and tool experience , actually the gas thing was easy with the water heater , I had to extend a pipe but with help from home depo guys guiding me on the right sealant for the threads and fittings it was a breeze , what I have to find out is what btus I need for the sq footage of the home for the right size furnace Im 75 yrs old but the mind is still in working order, thanks again

Crazy how labor intensive this is. You'd think they'd make it easier to install.

Last year I had my 80% gas furnace replaced for $3200. I thought about installing it myself. The factory wanted $2500 for one. It took 5-person crew 8 hours to remove and haul away the old one and install the new one with a new plenum and chimney liner. It would have taken me a week to do it. I figure it was $700 well spent.

if you want to replace your own hvac units, go with goodman cause thats the only brand that you can buy without being a contractor lol.

Your customer got the Goodman GM9s801005cn 100,000 BTU, 80% furnace, I bought the 80,000 BTU 96% to replace the 35 year old Lenox 100,000 BTU G11-e which was 80% and also took it's combustion air from the room which was a pain, the old flue used to sometimes push cold air down depending on wind, so I think what I have now is so much better- taking it's air from outside, and 16% more efficient. My NW Iowa house is about 1,100 sq ft but I have R100 in the attic, all double glas windows, and the walls are at least R21 as I added 2" of celotex on the inside over the old plaster and lath exterior walls, and sheeted with 1/2" CDX topped with 1/2" sheetrock. It was down in the teens recently and the Goodman is working fine, it doesn't seem to need to come on a lot or frequently to hold the temperature right on 73 degrees

Glad I found your channel. I’ve been getting quotes for over $3,000 just to install a unit. Seems crazy

Awesome video! Respect! Question: I know it's different in every town but aren't there inspections required once completed (at least for the electric and natural gas)?

I love it when a plan comes together

Don’t know if anyone mentioned this but you should not be putting two wires together under one screw on the switch. The correct way is to pigtail the two wires with a short pice of 14 gauge in a wire nut and connect that short wire to the switch.

You should make an amazon store with the stuff you use and link to it in the video description. I would probably buy a thing or two from it.

At the beginning of the install you turned the furnace of by the switch. I thought you need to close the gas valve first, wait a few minutes and then turn off the furnace by the switch. Correct me if I’m wrong it might only be for when you are servicing a unit and not replacing one.

Flexible gas connector cannot penetrate cabinet as Per B149 mechanical code in Canada.

Interesting. Enjoyed watching the video as an hvac installer. A couple of things I would have done different but you did a great job. As far as encouraging homeowners to diy. I don’t agree with that. Very unlikely they can do this and not mess it up tbh.

Man's best friend deserves a proper introduction.

Hi Dave , Thanks for your awesome videos, it would be great if you can also make videos on replacing furnace with installing other ancillary products to furnace like - whole house humidifier, surge protector, ionizer, UV light and share please share knowledge for these products if there are good to have or not require , how to but the correct product. Thanks in advance.

Excellent demonstration. Thanks.

Furnace from 1993 is going to give out soon so debating on installing it myself. I have all the proper tools just not sure if i should pull the trigger myself

Yeah it's easy enough, I always do my own work on everything, I replaced my 35 year old Lenox G11-e that I installed myself 18 years ago in my house that never had central heat or ducts, this time around I decided on a Goodman 80,000 BTU furnace, it was $1600, delivered fast, and I decided to put it in a more central location and run all new ducts- getting rid of the old 6" round stuff. My mistake on the Lenox was I figured two 6" round ducts were enough for the cold air return, while it worked fine trouble free for 18 years I decided to go considerably larger this time with two 8x16 returns to oppside ends of the house using the cavity a couple of former doorways that were moved provided in the walls to use. I also added an outside air electric damper to bring in fresh outside air, and unlike the Lenox the Goodman takes its combustion air from outside, so that meant running a couple of 2" PVC pipes. The biggest problem was the 8x16 and other sized ducts, Menards had SOME, HD had SOME, what I needed for some vertical elbows to go around a support, the plenum and return air box, and some other pieces were all special order with 2-3 week wait. I needed to make a small change and yep, the duct take offs and whatnot were special order, 2-3 weeks more wait time... I located a GOOD, well made filter rack on another site- Chad Vincent, BLG2-1625-3 Furnace Filter Rack 16x25 $85.99 it arrived in good shape, nice thick metal, with a spring loaded gasketed door on the side edge to access the filters. I was able to fit two 1" filters in it, a merv 11 filter and a cheaper one in front of it. I had to extend my basement gas line- removing the "leg" that went to the Lenox, adding a valve and flexible connector with the new safety cut-off in it, run a new electric line, and did both myself. Happy so far! One other issue I ran into, the drain Goodman has is a rubber hose you connect to a black pastic fitting that has a 45 degree angle barb and a straight round outlet, the maual etc didn't say a word about what fitting to use to exit that black barb connector that comes thru the cabinet, I even took it to the hardware store and we couldnt find anything that either inserted in or over the end of it, I couldnt even find photos showing what is used because those i found either had a connection for a pump which I didnt need, or the furnace wasnt connected in the photo, I knew i needed an open Tee and a barb to a hose but, eventually I found out that black fitting takes 1/2" PVC pipe glued into it, geez! could have had that in the install manual... so I glued in a short stub and a Tee, a barb and ran clear 5/8" hose to the floor drain. I do prefer to raise the furnace up off the floor, I did with 4 concrete blocks, never know if water might come in, and you dont want the furnace sitting in a few inches of water! Thankfully I don't have a stupid air conditioner coil to contend with and complicate things with freon lines, condensors and all that rubber, so it was just a straight furnace replacement, for air conditioning I'm considering a couple of mini splits to put in next spring.

You may have saved me 2000 dollars. Thank you

Thanks for the great video. I’m gettin. Ready to tackle this and am a pretty competent DIYer. Could you answer a question: Mechanically, the process looks straight forward. I’m wondering about sizing my furnace. My current furnace was undersized when I bought the house. It’s 45k BTU, the house is about 1500 sq ft, poorly insulated, has old windows and I live in the north. The house was a duplex when I bought it and I converted it back to a single family. Now this furnace can’t keep the 1st floor above 50 degrees in the winter running constantly and set to max. My question is- I found an 80k that will fit in the space and attach to the plenum very easily. How much do I have to think about gas supply. I’m only supply this, a 40 gallon water heater, and a gas stove. Should I be ok? Also- the manual has a start-up procedure that references measuring the pressure and adjusting the valve. This seems technical. I’m wondering if that’s a fine tuning adjustment and if I’m likely fine with factory settings. Long comment. Thanks for the feedback and great videos!

At 5:30, hardware stores carry a pack of wrenches that allow super easy installation and removal of box nuts like this for very cheap. If you have to do more than a couple of these, they pay for themselves. If this is the only project you’re doing that requires this then don’t waste the money and use the tip in the video

You’ll probably delete my comment but here goes. You have not done a load calculation so you don’t know if the new furnace or old furnace was right size. You have not done a static pressure test. Most newer furnaces need more return air. You have not checked heat rise. You did not check gas pressure. You did not do a combustion analysis. You did not verify or adjust fan speed to meat condenser tonnage. You are right that it could be done by a homeowner because they’re human just like hvac pros. But to get it installed correctly you need a manometer and combustion analyses . Buying these makes zero sense because it would cost more than paying an hvac company. Also in the real world furnaces don’t fit flush, they need transitions and people don’t have sheet metal tools or knowledge of making transitions. Goodman does sell to homeowners through online store and they are the worse rated equipment manufacturer. Coincidence? Or are they getting the bad reputation because of improperly installed equipment like you’re promoting?

Had a guy out a few years ago to give me an estimate on just replacing the furnace, $13,000. The system we chose, parts and all was less than $4,000, he was going to charge us $9,000 for 2 days work. I call that price gouging/theft, don't you?

When replacing the furnace does the fan control board need to be one that can control the AC as well

Can't thank you enough for the fantastic content!

The dog seems to hvaing a party, lol

I bought a house furnace was gone.forced hot air,gas..I bought a goodman 100,000 btu single stage.went off the gas line that was already installed.lp..my one question is does the manifold and or line pressure need to be checked with a manometer before i fire it up? Its a goodman m9s80 with lp conversion 07. Also there was a 16x20 filter with a return duct hanging.was curious if this should be a larger return?.Thanks!..great video!

You're my hero! Thank you for this video.

Yes they are easy to install but you need many things to do it. You will make many trips to home depot for electrical items and PVC and gas pipe sheet metal or duct board and the list goes on and on. You will spend more time at home depot then you will spend installing the furnace. A guy with a stocked truck will spend 4 to 6 hours it will take you 2 days with part run. The plus side you can save $2,000.00 doing it yourself so them two days will be well worth it.

No warranty though if installed by home owner. though if you can install your own furnace you should be able to fix it.

Fantastic job and teaching

I like your job You help me a lot

Hi Dave, I didn't think it would be easy to replace a furnace your explanation on every steps helps out tremdously,, but for the most part i'm certain it has its drawbacks too. Your DIY videos has given me an in-depth view on how to replaces gas furnaces. Are there best brands of HVAC systems you can recommend to replace? I'm out in CA central valley. Thank you,

I just got a bid to replace my old 3 ton furnace and AC with a 4 ton Carrier. $20k. That's why I'm here haha.

I got the Goodman 2 speed with the Braeburn thermostat. It's only a heat furnace, no accessories. HD sold me 5 wire thermostat wire. Goodman says I need 8/18 wire. Who's right? Thanks, keep doing vids.

Should I install a new heat pump to replace the old gas furnace and central air? Advantages and disadvantages ,please advise. Thank you.

I like the video, but why the semi rigid gas line going inside the furnace and not black pipe as required?

Thank you!! So no combustion air supply is needed? Also, no need for anchor bolts into the floor? TIA!

Great job thanks. Very competent.

Fantastic tutorial!!!!!

Well every time my furnace has gone out it is on the coldest day of the year in Minnesota. I keep my furnace guy’s number handy.

Nice job sir! An old DIY'r like myself really appreciate channels like yours. Do you have a list of companies that will allow you to purchase their equipment without being an HVAC professional? Also how about a how to on installing an a/c system? Condenser, line set and A coil. I would like to install the a/c in the future.

How much this cost for just labor ? Great vedio

very educative. Thank you regards

Hi from NJ !! Great job and thanks for the tips 👍🏻👍🏻👍🏻

It's against code to run a gas flex connector into the gas valve. Needs to be hard piped with a drip leg.

I wouldn't dare try this in Texas. In the summer you'll roast and in the winter you'll freeze. You also don't have a truck full of parts that you're going to need like the pros have. Then its a dang trip to Lowes or Home Depot every couple of hours. Even if you do a good job of preparing you're going to forget something and that parts truck will be something you'll wish you had. If and when you finish you'll swear you'd never do it again.

You made that look easy.

Dam. I just had mine replaced by someone my neighbor knows. He charged me 5k for parts and labor for an 80,000 BTU 96%. Is that a good price? I’m pretty handy but I don’t know much about gas furnace so I didn’t try it myself. After watching this video it doesn’t seem too hard. Especially when I have all kinds of tools.

Super great video! i was wondering if i could. But you have just empowered me :) THank you!!!

My man! Great video! Is that flex line 1/2"? Would it hurt to use 5/8"?

Thank you so much!!!

If my new furnace is going to be about 7" shorter than my previous furnace, do I need to rebuild the plenum, or can I just add an extension down the 7 inches? Thanks for all your videos!

Thank you man

How come you didn't put any pads underneath the furnace. And why did you use a flexline on the gas? That's not code where i'm from.

Great video !

Excellent video

Good video, How long does it took you to replace that furnace?

How old was that unit?? Looks pretty new! It's not rocket science, but a lot of things can go bad! Usually shocks, fires, gas leaks etc...

Just curious, why did you need to carry and use 2 different cordless drivers? They are both very similar but does one do something the other doesn't, and would you not be able to complete the job without both?

Thank you for posting!

Hi Dave! Awesome video! Great detail! How much do you estimate a DIY would need to spend on all the tools that you used on this install?

This is not a diss, just a question since I’m not as familiar with furnaces. With that being said, I’m fairly knowledgeable within these types of machines since I’m a steam/hydronic boiler contractor in CA. Anyways my question is, do you not have tune air and gas pressures to achieve a satisfactory emissions? Or even to check that the pressures are setting are correct? This could have been done off camera I suppose. However, I didn’t see you fiddle with the gas valve at all. My main concern is telling weekend warriors that changing out a furnace is as easy as 1, 2, 3, and then having them flood their house with carbon monoxide because they actually have no idea what they’re doing.

Thank you much

what was the name of tool used to sense for voltage at the beginning after removing the lid door of the furnace ?

Great job man

Thanks for the video. What if the return air duct was on the left side? Do you simply cut the hole on the other side or do you order a different unit?

Very nice thanks

Hey Dave! Love your videos! Q: Looking for new & simple direct vent (no chimney) gas BOILER (80% efficiency is fine) (not a furnace) that has best shot to last 20 to 25 years and is low maintenance - zero bells and whistles. My focus is not efficiency. Priority = low maintenance and longevity. Currently running 1991 Slant Fin V90 - 80% Direct Vent - baseboard forced hot water - has been excellent, but time to change out. Thoughts, guys/gals? TY!

thanks for posting this video and encouraging DIY workers! What in the heck is that sheet metal cutting adaptor you used on your power drill to cut the side of the furnace?

Hey Dave just want to say thank you for all the great information you provided. I do notice that you do check air flow, gas pressure. Is this not required? I purchased goodman furnace and ac combo down flow and ac is an addition, didn't have it before. Just concerned with adjusting pressure or flow, do these units come preset or do they need to be adjusted? Gces800603an, gsx130241

That's an 80 percent furnace correct? Why not get a 95 to 98 percent furnace I know you would have to put new pipe in for your gasses to go outside and put in fresh air intake as well I was just wondering.

the height of the furnace was perfect and no adapter duct.. any trick to that or you just got lucky? .. how does the goodman warranty work? they just call goodman and they send out a tech? they call you and you submit a parts list to goodman and get reimbursed? I am trying to learn how to replace both my Furnace and AC unit.. have a carrier and the drip pan under the evaporator has a crack in it and its been leaking for a couple years .. replacement pan is $400 SERIOUSLY and its a serious bitch to replace.. i think the evaporator is partly clogged because I get icing on the worst days of summer.. I did work on it some.. I might have got it fixed idk but i fear the heat exchangers are rusting so its all just time .. but I am thinking its not a bad idea to prepare for this.. guess I will need a vaccum compressor.. have gauges but their from automotive might not work.. then i have to find out how I can get a bottle of nitrogen.. living somewhat rural not a lot of options for that.. might have to pay a tech to do the evac but that will cost less than a full install .. Goodman seems like a good company too.. most of their stuff is made in America.. well you know not all but there is a tour of their plant and they make all the coils and burners and cases so its cool .. better than Carrier ... thanks for posting the videos.. you make it look easy and I know when you run into trouble its not easy for a first timer but its also not impossible. And it can save you a lot of money. I figure the savings will go into a higher seer rating and maybe another ton of cooling capacity :o)